001/*
002 * SPDX-License-Identifier: Apache-2.0
003 *
004 * Copyright 2024-2026 The Enola <https://enola.dev> Authors
005 *
006 * Licensed under the Apache License, Version 2.0 (the "License");
007 * you may not use this file except in compliance with the License.
008 * You may obtain a copy of the License at
009 *
010 *     https://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package dev.enola.rdf.io;
019
020import dev.enola.common.convert.ConversionException;
021import dev.enola.common.convert.ConverterInto;
022import dev.enola.rdf.proto.AbstractModelConverter;
023import dev.enola.rdf.proto.ProtoThingRdfConverter;
024import dev.enola.thing.Thing;
025import dev.enola.thing.message.JavaThingToProtoThingConverter;
026
027import org.eclipse.rdf4j.rio.RDFHandler;
028
029import java.io.IOException;
030import java.util.stream.Stream;
031
032public class JavaThingRdfConverter
033        implements AbstractModelConverter<Stream<Thing>>, ConverterInto<Stream<Thing>, RDFHandler> {
034
035    // TODO Implement this more directly, instead of indirect via Proto; with JavaThingRdfConverter?
036
037    private final JavaThingToProtoThingConverter javaToProto = new JavaThingToProtoThingConverter();
038    private final ProtoThingRdfConverter protoToRdf = new ProtoThingRdfConverter();
039
040    @Override
041    @SuppressWarnings("ResultOfMethodCallIgnored")
042    public boolean convertInto(Stream<Thing> from, RDFHandler into)
043            throws ConversionException, IOException {
044
045        from.forEach(
046                thing -> {
047                    var protoBuilder = javaToProto.convert(thing);
048                    protoToRdf.convertInto(protoBuilder, into);
049                });
050
051        return true;
052    }
053}